. Botany for agricultural students. Plants. of a section through an Potato, r, rind composed of a The protection afforded by an umber of layers of cork cells, epidermis and cork is often brought s, tissue filled with food. Highly to our notice in case of fruits, tubers, magnified. ^^^^ fleshy roots. Thus Apples, Oranges, and most fruits which may be kept a long time, if uninjured, soon decay when their rinds are broken. The efficiency of a corky rind to protect against the loss of water is shown by the experiment in which a peeled Irish Potato lost sixty times as much water in 48 hours as an u
. Botany for agricultural students. Plants. of a section through an Potato, r, rind composed of a The protection afforded by an umber of layers of cork cells, epidermis and cork is often brought s, tissue filled with food. Highly to our notice in case of fruits, tubers, magnified. ^^^^ fleshy roots. Thus Apples, Oranges, and most fruits which may be kept a long time, if uninjured, soon decay when their rinds are broken. The efficiency of a corky rind to protect against the loss of water is shown by the experiment in which a peeled Irish Potato lost sixty times as much water in 48 hours as an unpeeled one of equal weight. Furthermore, cork tissue has an ad- ditional function in the healing of wounds where, by the development of a callus-like mass of cork, the open- ^^^ coUen- ing of the wound is closed and the chyma cells from the stem break in the protective covering of of a Dock (Rumex) showing the plant thereby repaired. It is im- the cells thickened mainly portant to recognize this fact in prun- at the angles. After Cham- , , 11 ii berlam. mg where the promptness as well as the thoroughness of the healing depends much upon how the wound is Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Martin, John N. (John Nathan), b. 1875. New York, John Wiley ; London, Chapman & Hall
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1919
